ATI
Q46/84 Hydrogen Peroxide Monitor
Part 3 – Sensor/Flowcell Mounting
14
O&M Manual
Rev-H (6/17)
Once mounted, inlet and drain connections must be made. The flow cell contains a 1/8" MNPT
inlet connection and a 3/8" MNPT drain connection. Hose barbs for the inlet and drain
connections are supplied with the flow cell for use with flexible tubing. The inlet hose barb is
used with ¼" I.D. tubing and the drain hose barb is used with ½" I.D. tubing.
3.3 Sealed Flowcell
Applications where the sample inlet flow is well controlled can use a simpler sealed flowcell.
Using this flowcell requires that flow be controlled externally to about 400 cc/min. Variable flow
rate or variable pressure will cause unstable readings in this flowcell. ATI offers a special flow
control element that can be used ahead of this flowcell on the incoming sample line. The flow
control is part no. (55-0048). It will control the inlet flowrate at 400 cc/min. with inlet pressure
variations from 5-150 PSIG. A 50 micron y-strainer ahead of the flow control element is
recommended. The sealed flowcell provides a drain vent with check valve to avoid pulling a
vacuum on the flow chamber.
Figure 8 - Sealed Flowcell Details
